| Rusty Russell | 07ad157 | 2007-07-19 01:49:22 -0700 | [diff] [blame^] | 1 | /* Things the lguest guest needs to know. Note: like all lguest interfaces, |
| 2 | * this is subject to wild and random change between versions. */ |
| 3 | #ifndef _ASM_LGUEST_H |
| 4 | #define _ASM_LGUEST_H |
| 5 | |
| 6 | /* These are randomly chosen numbers which indicate we're an lguest at boot */ |
| 7 | #define LGUEST_MAGIC_EBP 0x4C687970 |
| 8 | #define LGUEST_MAGIC_EDI 0x652D4D65 |
| 9 | #define LGUEST_MAGIC_ESI 0xFFFFFFFF |
| 10 | |
| 11 | #ifndef __ASSEMBLY__ |
| 12 | #include <asm/irq.h> |
| 13 | |
| 14 | #define LHCALL_FLUSH_ASYNC 0 |
| 15 | #define LHCALL_LGUEST_INIT 1 |
| 16 | #define LHCALL_CRASH 2 |
| 17 | #define LHCALL_LOAD_GDT 3 |
| 18 | #define LHCALL_NEW_PGTABLE 4 |
| 19 | #define LHCALL_FLUSH_TLB 5 |
| 20 | #define LHCALL_LOAD_IDT_ENTRY 6 |
| 21 | #define LHCALL_SET_STACK 7 |
| 22 | #define LHCALL_TS 8 |
| 23 | #define LHCALL_TIMER_READ 9 |
| 24 | #define LHCALL_HALT 10 |
| 25 | #define LHCALL_GET_WALLCLOCK 11 |
| 26 | #define LHCALL_BIND_DMA 12 |
| 27 | #define LHCALL_SEND_DMA 13 |
| 28 | #define LHCALL_SET_PTE 14 |
| 29 | #define LHCALL_SET_PMD 15 |
| 30 | #define LHCALL_LOAD_TLS 16 |
| 31 | |
| 32 | #define LGUEST_TRAP_ENTRY 0x1F |
| 33 | |
| 34 | static inline unsigned long |
| 35 | hcall(unsigned long call, |
| 36 | unsigned long arg1, unsigned long arg2, unsigned long arg3) |
| 37 | { |
| 38 | asm volatile("int $" __stringify(LGUEST_TRAP_ENTRY) |
| 39 | : "=a"(call) |
| 40 | : "a"(call), "d"(arg1), "b"(arg2), "c"(arg3) |
| 41 | : "memory"); |
| 42 | return call; |
| 43 | } |
| 44 | |
| 45 | void async_hcall(unsigned long call, |
| 46 | unsigned long arg1, unsigned long arg2, unsigned long arg3); |
| 47 | |
| 48 | /* Can't use our min() macro here: needs to be a constant */ |
| 49 | #define LGUEST_IRQS (NR_IRQS < 32 ? NR_IRQS: 32) |
| 50 | |
| 51 | #define LHCALL_RING_SIZE 64 |
| 52 | struct hcall_ring |
| 53 | { |
| 54 | u32 eax, edx, ebx, ecx; |
| 55 | }; |
| 56 | |
| 57 | /* All the good stuff happens here: guest registers it with LGUEST_INIT */ |
| 58 | struct lguest_data |
| 59 | { |
| 60 | /* Fields which change during running: */ |
| 61 | /* 512 == enabled (same as eflags) */ |
| 62 | unsigned int irq_enabled; |
| 63 | /* Interrupts blocked by guest. */ |
| 64 | DECLARE_BITMAP(blocked_interrupts, LGUEST_IRQS); |
| 65 | |
| 66 | /* Virtual address of page fault. */ |
| 67 | unsigned long cr2; |
| 68 | |
| 69 | /* Async hypercall ring. 0xFF == done, 0 == pending. */ |
| 70 | u8 hcall_status[LHCALL_RING_SIZE]; |
| 71 | struct hcall_ring hcalls[LHCALL_RING_SIZE]; |
| 72 | |
| 73 | /* Fields initialized by the hypervisor at boot: */ |
| 74 | /* Memory not to try to access */ |
| 75 | unsigned long reserve_mem; |
| 76 | /* ID of this guest (used by network driver to set ethernet address) */ |
| 77 | u16 guestid; |
| 78 | |
| 79 | /* Fields initialized by the guest at boot: */ |
| 80 | /* Instruction range to suppress interrupts even if enabled */ |
| 81 | unsigned long noirq_start, noirq_end; |
| 82 | }; |
| 83 | extern struct lguest_data lguest_data; |
| 84 | #endif /* __ASSEMBLY__ */ |
| 85 | #endif /* _ASM_LGUEST_H */ |